Machine for bending wood.



N0. 667,284. Patented Feb. 5 |901.

F. H. BANCFT.

MACHINE FOR BENDING WOOD. (Applicafon led Sept. 16, 1899.)

(N o Model.)

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Nrrnn STATES FRANK H. BANCROFT, OF GARDNER,

MASSAOHUSETTS, ASSIGNOR OF ONE- HALF TO HENRY M. RICH, OF SAME PLACE.

MACHINE FOR BENDING WOOD.

SPECIFICATION forming part of Letters Patent No. 667,284, dated February5, 1901.

Application filed September 16, 1899. Serial No. 730,722. (No model.)

To all whom, it may concern:

Be it known that I, FRANK H. BANCROFT, a citizen of the UnitedStates,residing at Gardner, in the county of Worcester and Oom monwealthof Massachusetts, have invented new and useful Improvements in a Machinefor Bending Wood, of which the following is a specification, accompaniedby drawings forming a part of the same, in Which- Eigure 1 represents aside elevation of a Wood-bending machine embodying my invention. Fig. 2is a top view with the table removed. Fig. 3 is a top view of themachine, and Fig. 4 is a side view of the rotating disk with a formattached thereto and shown in sectional View.

Similar characters refer to similar parts in the different figures.

The object of my invention is to provide a machine for bending Woodcomprising a rotating form upon which the piece of Wood to be bent isWound; and it consists in the construction and arrangement of parts, ashereinafter described.

Referring to the drawings, l 1 denote the legs upon which the machine issupported.

2 is a hydraulic cylinder having a connection with a source of waterunder pressure controlled by suitable actuating-valves, (not shoWn,) asis common in machines actuated by hydraulic pressure.

3 is a plunger contained withinV the cylinder 2 and having attachedthereto a rack 4, which engages a pinion 5, attached to a short verticalspindle 6, journaled in suitable bearings in the machine and carrying onits upper end a rotating disk 7, provided with T- shaped grooves 8.Supported on the framework is a table 9, provided With T-shaped grooves10 and having its upper surface flush With the upper surface of therotating disk 7. The rack 4 has an extension 11, to Which a cable 12 isattached, which passes over a pulley 13 in order to change itsdirection, and to the opposite end of the cable is suspended a weight14, by which the motion of the rack 4 is reversed after the plunger 3has been forced out by the pressure of the Water in the cylinder 2.

The framework of the machine comprises a rod 15 parallel with the rack4, upon which is adjustably clamped a sleeve 16, having/a projecting arm17 held in the path of a lug 18, projecting from the plunger 3 andserving as a stop to limit the reverse motion of the rack 4 and disk 7.

Upon the rotating disk 7 is attached a cylindrical bending-forni 19,Whose periphery corresponds to the desired curvature of the Wood to bebent. The form 19 is preferably provided With slots 2O 20, in one ofwhich a block 21 is inserted, havinga hole in which is inserted the endof the piece of Wood 22 to be bent. Water is then admitted to thecylinder 2, forcing out the plunger 3 and rotating the disk 7 and form19 in the direction of the arrow A, Fig. 3, causing the piece of Wood 22to be Vwound upon the form 19 by means of a stop 23, attached to thesurface of the table in proper position to bear against the side of thestrip 22 and cause it to be wound upon the form 19. When the form 19 hasbeen rotated sufficiently to give the desired curvature to the strip 22,a clip 24 is inserted over the edge of the form 19 and the strip 22 tohold it i`n contact with the form, and the form and bent strip are thenremoved from the rotating disk 7 and the strip 22 held in its bentposition on the form by the block 21 and clip 24 until the curvature ofthe Wood becomes permanent. A newr form is then applied to the rotatingdisk and water allowed to escape from the cylinder 2, when the rack anddisk are reversed by the counterweight 14 until the lug 18 is broughtinto contact with the arm 17, when the parts are again in position tobend the succeeding piece.

As the amount of rotation of the disk 7 varies in different cases, thesleeve 16 is adjustably attached to t-he rod 15 to stop the reverse 9omotion of the rack at different points in its reverse motion.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. Ina machine for bendingwood,the combination of a rotating spindle, adisk carried by said spindle,means for attachinginterchangeablebending-forms of different sizes to said disk, means for rotating saidspindle in one direction with a range of motion correspond- IOO ing tothe largest bendingform, means for reversing the motion of said spindleand an adjustable stop for varying the reverse motion of said spindle asdetermined by the size of the bending-forms, substantially as described.

2. The combination of a table, a rotating spindle,a disk carried bysaidspindle adapted to carry interchangeable bending-forms of differentsizes, a pinion on said spindle, a rack:

engaging said pinion, means for moving said rack in one direction with arange of motion corresponding-to the largest bending-form, means forreversing the motion of said rack,

a rod held by the framework and parallel With tne line of motion of saidrack and an adjustable stop on said rod by which the reverse mo senesiname to this specification, in presence of two subscribing Witnesses,this 23d day of August, k1899.

FRANK H. BANCROFT. Witnesses:

BERTHA M. ATKINS, ALBERT A. UPToN.

